Finding the Fourth Proportional to 1,408.70, 2,111.89 and 1,061.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.70 : 2,111.89 = 1,061.37 : x
2. Step 2: Convert to fraction form
   1,408.70/2,111.89 = 1,061.37/x
3. Step 3: Cross multiply
   1,408.70x = 2,111.89 × 1,061.37
4. Step 4: Simplify right side
   1,408.70x = 2,241,496.69
5. Step 5: Solve for x
   x = 2,241,496.69/1,408.70
6. Step 6: Final answer
   x = 1,591.18